Xirang (Chinese: 息壤; pinyin: xīrǎng), also known as Swelling Earth is a magical substance in Chinese mythology that had a self-expanding ability to continuously grow – which made it particularly effective for use by Gun and Yu the Great in fighting the rising waters of the Great Flood.
After begging Shangdi, he received from him a gift of as much xirang as his magical black tortoise could carry on its back, thus allowing Yu to successfully block up the 233,559 springs, the sources of the flood waters.
Later Nuwa cut the 4 legs of the tortoise to become the 4 pillars.
The azure sky were patched, the 4 pillars setup, the surging flood waters were drained, the province of Ji was tranquil, crafty vermin died off, blameless people preserved their lives.
Your turtle literally has no legs to stand on Flat earther